重症心身障害者における眼輪筋反射

A Study of Blink Reflex in Person with Severely Handicapped

　1）重症心身障害者50例について眼輪筋反射を施行した。正常BRは7例（14％），異常BR例では，R1よりもR2・R2'に高率に潜時の延長や反応の消失が認められ，spinal trigeminal complexやbulbarreticular formationの機能異常が示唆された。

　2）BR異常は，知能障害，球麻痺・仮性球麻痺と関連性があり，ABRおよび頭部CT所見からも，BRに対する上位中枢からの作用因子の存在が重症心身障害者では示唆された。

　3）BRは，潜在性の脳幹機能障害の評価も含め，重症心身障害者にとって意義のある検査であった。

1) We evaluated blink reflex from 50 cases of severe handicapped. 7 cases (14%) had normal blink reflex. Abnormality of prolonged latency or no response of blink reflex was much more easily seen on R2 and R2' than R1, and dysfunction of spinal trigeminal complex or bulbar reticular for-mation might be existed in those cases.

2) We found abnormal blink reflex had some rela-tionship with mental disturbance or bulbar function. Result of ABR and head CT also suggested that some kinds of cerebral factors might influenced to blink reflex of severe handicapped cases.

3) Blink reflex was one of the useful records for severe handicapped patients to evaluated underline pathogenesis of brain stem function.